<!doctype html>
<html>
<head>
	<meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0" />
	<meta charset="UTF-8" />
	<title>响应式网页布局</title>
	<link rel="stylesheet" href="css/index.css" />
</head>
<body>
	<div class="container">
		<div class="col">网页的左侧</div>
		<div class="col">网页的中间</div>
		<div class="col">网页的右侧</div>
	</div>
</body>
</html>
  缓存   git add .
  描述git commit -m "first commit"
  上传git push -u origin master
